the white stuff could be "white fly".) n% ^3 V6 w. Y
I had the same problem before. It because your plant is too wet. I showed the leaves twice a day for a whole week, then the white filies were all gone.! f9 {' w- W' j1 v/ q; t/ H/ s( U* \
Hibiscus is a typical plant, show helps a lot.